Abstract: A soil compaction machine, in particular, a vibration compactor, is provided which comprises a vibration exciter for generating different kinds of exciter vibration having a first and a second imbalance shaft, which are arranged in parallel to one another. Each imbalance shaft is driven via a separate motor, so that the rotational velocity, the rotational direction, and the phase relation of each of the imbalance shafts can be changed separately.

Abstract: The present invention relates to a rotor hood for a milling apparatus, with a front hood part, a rear hood part and two side hood parts, the front and the rear hood part enclosing together with the two side hood parts a working space that is open at the bottom, further comprising a stripping device which is mounted on the rotor hood and which forms the rear lower edge of the rotor hood in the working direction. The present invention further relates to a construction machine with a milling apparatus and such a rotor hood and a method for operating a milling apparatus with a rotor hood.

Abstract: The invention relates to a construction vehicle for preparation of a road surface, more particularly a road milling machine or a ground stabilizer, comprising a rotatably driven milling cutter, more particularly a milling rotor or a milling drum, and a drive unit for a milling tool, comprising a drive motor and a gear unit interposed between the drive motor and the milling cutter, wherein the gear unit is in the form of a cogwheel gearbox and comprises at least two gear pairings having different gear ratios, wherein the gear pairings can be selectively engaged to form part of the drive connection or disengaged therefrom.

Abstract: A hydraulic control arrangement for activating a double-acting actuating cylinder, which is connected on the piston side to a road finisher and on the piston-rod side to a screed of the road finisher, is provided. The hydraulic control arrangement includes a supply connection, a tank connection and two consumer connections, in which a loading pressure or a relief pressure is applied to the piston of the actuating cylinder via the consumer connections. The loading pressure or relief pressure is controlled as a function of a defined operating state, and, in a controlling-the-screed-load operating state, the relief pressure supplied to the actuating cylinder on the piston-rod side is controlled via a proportional pressure control valve.

Abstract: The present invention relates to a work train, a device and a method for distance measurement between a transport device and a milling device. During the loading of a transport device with milled material from the milling device, the operator of the milling device normally transmits control commands to the transport device driver for coordination of the loading process. Through the automated distance measuring between the transport device and the milling device and control of a display device according to the present invention, this task is taken over from the operator of the milling device, who can concentrate on the actual milling process.

Abstract: The present invention relates to a device and method for ascertaining the steering angle (?3) of at least one steerable wheel of a set of steerable wheels of a machine that can be directionally controlled, which machine comprises at least said set of steerable wheels and at least one set of drivable wheels showing a specific wheelbase (a1) relative to said steerable wheels and spaced from one another by a specific track width (b1), wherein by means of an ascertained wheel velocity difference of the two driven wheels a yaw rate (?) and a real circle radius (r1) of the driven wheel on the inside of the curve are ascertained. It is then possible to ascertain the steering angle (?) from these values by way of the geometrical relationship of wheelbase (a1) and track width (b1) of the machine.

Abstract: The present invention relates to a road finisher comprising a screed plate and/or a tamper bar and also to a screed plate and/or tamper bar comprising a heating layer applied by thermal spraying.

Abstract: There are described a height adjusting device for an extendable screed plate for a road finisher and a road finisher comprising such a device. A ground element of the extendable screed plate is disposed with two pairs of worm gears on a top part of the extendable screed plate for vertical displacement thereon, wherein the worm gears of each pair are interconnected by a power transmission for concomitant actuation. Each pair is provided with a releasable clutch, preferably a conical clutch, by means of which the connection between an adjusting member of a pair and the associated transmission gear can be broken.

Abstract: The present invention relates to an interchangeable holder system comprising a basic module and an interchangeable holder for the accommodation of a cutting tool, which interchangeable holder is capable of being attached to the basic module, for the purpose of preparing ground surfaces, and to a construction machine, more particularly a stabilizer, a recycler, or a cold milling machine, comprising a milling device comprising such an interchangeable holder system.

Abstract: The present invention relates to a vibration exciter for generating a directed excitation vibration, especially for installation in a vibration tamper, and a machine with such a vibration exciter, comprising at least two parallel extending unbalance shafts which are rotatable against one another, on which at least one respective fixed unbalance mass and at least one respective movable unbalance mass are arranged, with the positions of the movable unbalance masses on the unbalance shafts being variable by way of an adjusting device for adjusting the amplitude of the exciter vibration, and with the adjusting device comprising a central adjusting element for amplitude adjustment which acts on the movable unbalance masses of the two unbalance shafts, which central adjusting element is arranged coaxially to a rotational axis (AS) about which the vibration exciter is rotatable for the purpose of vector adjustment of the excitation vibration.

Abstract: The present invention relates to the exhaust gas guiding of a road milling machine. The road milling machine comprises an internal combustion engine, an engine air inlet, via which the engine air flows from the outside to the internal combustion engine, an engine air outlet, via which the engine air is conducted out of the road milling machine, a device for generating a flow movement of the engine air from the engine air inlet to the engine air outlet, and an exhaust system which is implemented for discharging the exhaust gases occurring during operation of the internal combustion engine from the internal combustion engine out of the road milling machine, having an exhaust gas outlet. The engine air is used to cool the exhaust gas.

Abstract: The present invention relates to a construction machine, in particular a ground milling machine, comprising transportation means connected to the machine frame via lifting columns. The lift adjustment of the lifting columns occurs as a function of the determined pressure values respectively applied to at least one actuator of a pair of front and/or rear transportation means. The present invention further relates to a method of compensating for ground unevenness for such a construction machine.